linux-kernel - [PATCH percpu/for-4.3] percpu: update incorrect comment for this_cpu

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Message-ID: <20150626212128.GJ15805@mtj.duckdns.org>
Date:	Fri, 26 Jun 2015 17:21:28 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, kernel-team@...com
Subject: [PATCH percpu/for-4.3] percpu: update incorrect comment for
 this_cpu_*() operations

this_cpu_*() ops have been protected against both preemption and
interrupts for quite a while now.  We apparently forgot to update the
comment.  Fix it.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Christoph Lameter <cl@...ux-foundation.org>
---
 include/linux/percpu-defs.h |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -488,10 +488,8 @@ do {									\
 #define __this_cpu_dec_return(pcp)	__this_cpu_add_return(pcp, -1)
 
 /*
- * Operations with implied preemption protection.  These operations can be
- * used without worrying about preemption.  Note that interrupts may still
- * occur while an operation is in progress and if the interrupt modifies
- * the variable too then RMW actions may not be reliable.
+ * Operations with implied preemption/interrupt protection.  These
+ * operations can be used without worrying about preemption or interrupt.
  */
 #define this_cpu_read(pcp)		__pcpu_size_call_return(this_cpu_read_, pcp)
 #define this_cpu_write(pcp, val)	__pcpu_size_call(this_cpu_write_, pcp, val)
--
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